BCGControlBar Pro for MFC
void CBCGPColorMenuButton::EnableOtherButton ( LPCTSTR  lpszLabel,
BOOL  bAltColorDlg = TRUE,
BOOL  bEnable = TRUE 
)

Enables ability to invoke a color selection dialog from the color bar

Use this member function when you want to allow the user to select a custom color from the color dialog (system or provided by BCGProControlBar Library). When "Other" button is enabled, it appears on the popup color bar.

Parameters
lpszLabelA new button' s text
bAltColorDlgA new button' s text
bEnableSpecifies whether the "Other" button should appear or not